So I had to buy a spiral tap M22P1.5 in advance, was purchased in order to tap and set. The material of the dice is that the can not be threading of SKS so stainless steel, but since I mainly use the threading of brass and gunmetal, I think that it is sufficient capacity. The price, when the general made to the diameter of this position, tap, because it becomes quite expensive both die, was very helpful for me to buy in DIY purpose. It is inexpensive, but it was also beautiful finish.